1.A proposed scoring system to screen for vasospasm following aneurysmal subarachnoid hemorrhage.
Joseph Erroll V. Navarro ; Jose C. Navarro *
Neurology Asia 2007;12(1):7-11
Vasospasm has been known to cause permanent morbidity in 40-70% of survivors who suffered from subarachnoid hemorrhage (SAH). Early recognition of vasospasm is the key to better outcome of SAH. Cerebral angiography is expensive and impractical as a monitoring tool. Transcranial Doppler is operator dependent, and not readily available. The objective of this study is to devise a non invasive tool to screen for cerebral vasospasm following SAH. The proposed vasospasm score was based on clinical and cranial CT scan features. The features are hypertension, admission World Federation of Neurosurgeons Score (WFNS), amount of blood in the cisterns and subarachnoid space, intraventricular hemorrhage and hydrocephalus. Thirty six patients with aneurismal SAH were assessed retrospectively and correlated with the angiogram for vasospasm. The patients’ vasospasm score and their corresponding sensitivity and specificity were: 1 (100%, 0%), 2 (100%, 8%), 3 (100%, 8%), 4 (100%, 8%), 5 (91%, 46%), 6 (74%, 85%), 7 (48%, 85%), 8 (26%, 23%), 9 (3%, 100%), 10 (4%, 100%). A receiver operator characteristic curve was constructed that yielded a cut-off score of 6. The score of 6 was a good trade-off between sensitivity (74%) and specificity (85%). A clinical vasospasm score was proposed to screen for vasospasm after SAH. A score of 4 to 6 was found to correlate with angiographic vasospasm. Prospective study is required to validate the scoring system.
Vasospasm
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Subarachnoid Hemorrhage
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Clinical
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Vasospasm mechanism
;
Scores
2.Is there a stigma of psychiatrists among medical colleagues in Tarlac?
Mallari Ma. Cecilia C. ; Conde Bernardo Jorge L. ; Navarro Jose C.
The Philippine Journal of Psychiatry 1998;22(2):9-11
Psychiatrists are numerous in urban areas, but are lacking in the provinces. Could there be a discrimination of psychiatrists by physicians in the rural areas? Is there a stigma attached to being a psychiatrist in the province? In an attempt to answer the above questions, a questionnaire survey of physicians in the province of Tarlac was conducted. Internal validity of the questionnaire was tested using Cronbach Alpha. Two pretests were conducted; the actual test consisted of 25 items with 92 points. Stigma was defined in terms of a cutoff value above 50% from the total number of points. In 75% of the respondents, there was a stigma attached to being a psychiatrist in Tarlac. The following were cited as disadvantages if being a psychiatrist in the said province: few patients, inadequate facilities and poor income. Some thought that psychiatrists might identify with their patients and acquire the same symptoms. The presence of stigma caries a negative implication as to the delivery of mental health care. There is a need to re-orient and re-educate physicians in Tarlac and reintegrate psychiatry into general medical practice.
Human
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Male
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Female
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Aged
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Middle Aged
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Adult
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PSYCHIATRY
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PHYSICIANS
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ATTITUDE
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3.Aspirin resistance among patients with recurrent non-cardioembolic stroke detected by rapid platelet function analyzer
Jose C Navarro ; Annabelle Y Lao ; Maricar P Yumul ; Maria Leticia C Araullo ; Johnny K Lokin ; Alejandro C Baroque ii
Neurology Asia 2007;12(1):89-95
Background and Objective: The prevalence of aspirin resistance amongst patients with cardiovascular
disease and in the healthy population has been reported to range from 5% to 45%. Lately, rapid platelet
function analyzer (RPFA) a point-of-care determination of platelet aggregability has been introduced for
rapid determination of aspirin resistant patients. The purpose of this paper is to report the prevalence
of aspirin resistance among patients with recurrent non cardioembolic ischemic stroke as detected
by RPFA (Ultegra®). Methods: Seventy-seven patients with mean age of 61.2 + 10.4 (range 33-87
years) who developed recurrent non-cardioembolic ischemic stroke were consecutively included in the
study. Fifty-seven (74%) were males. Aspirin resistance was determined using the RPFA (Ultegra®)
machine. Patients with an aspirin reaction unit (ARU) value above 550 were identified as aspirin
resistant. Results: Following this method, the prevalence of aspirin resistance was determined to be
10.4% (95% CI: 1% to17%). Comparison of baseline characteristics between aspirin resistant and
aspirin responsive patients did not show any significant difference.
Conclusion: The prevalence of aspirin resistance in this study was 10.4% amongst patients with
recurrent non-cardioembolic ischemic stroke. The study has shown the feasibility of utilizing RPFA
(Ultegra®) machine in detecting aspirin resistance.
4.A correlation between ovulatory phase and cytohormonal maturation index of women with affected disorders: a preliminary study
Ang Maria S. ; Delgado Dennis ; Cabrera Mary ann ; Conde Bernardo J.L. ; Navarro Jose C.
The Philippine Journal of Psychiatry 1998;22(2):4-8
Difference in endocrine features between men and women supports a biological hypothesis in affective disorders among women. Studies done showed high probability that mood changes in associated with hormonal alterations, particularly that of estrogen and progesterone. There are cyclic morphological changes occurring in the female reproductive system in response to these hormones.
The cytohormonal maturation index (CHMI) is used to evaluate the female hormonal milieu. A differential of the three types of cells is expressed as percentages of the parabasal (P), the intermediate (I), and the superficial (S) cells, in that order. Predominance of the intermediate cells reflect high levels of progesterone, and the superficial cells that of estrogen.
This study aims to compare the correlation of CHMI with ovulatory phase between women of reproductive age with affective disorder and normal control; and to compare the CHMI of the two groups.
Eight women of reproductive age (mean age = 29.62 +/- 7.95), diagnosed to have affective disorders and having an episode of mania/hypomania or depression, underwent Paps smear. Written consents were obtained. LMP and PMP were obtained to determine the current ovulatory phase. The control group is composed of seven women of same age group (mean age = 29.29 +/- 6.65) having no manifestations of any psychiatric illnesses. Paps smear was performed by a Gynecology Resident. A Pathology Resident blinded to the study reviewed the slides for CHMI.
Fishers exact I test and Mann-Whitney U test were utilized. A p value of 0.05 was considered as statistically significant. There is a significant difference in the proportion of agreement between the ovulatory phase and the CHMI between the two groups (p=0.045). However, there is no difference in the percentages of progesterone and estrogen between the two groups (p=0.247 and 0.452, respectively).
Human
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Female
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Adult
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WOMEN
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FOLLICULAR PHASE
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MOOD DISORDERS
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;
5.Stroke Epidemiology in South, East, and South-East Asia: A Review.
Narayanaswamy VENKETASUBRAMANIAN ; Byung Woo YOON ; Jeyaraj PANDIAN ; Jose C NAVARRO
Journal of Stroke 2017;19(3):286-294
Asia, which holds 60% of the world’s population, comprises some developing countries which are in economic transition. This paper reviews the epidemiology of stroke in South, East and South-East Asia. Data on the epidemiology of stroke in South, East, and South-East Asia were derived from the Global Burden of Disease study (mortality, disability-adjusted life-years [DALYs] lost because of stroke), World Health Organization (vascular risk factors in the community), and publications in PubMed (incidence, prevalence, subtypes, vascular risk factors among hospitalized stroke patients). Age- and sex-standardized mortality is the lowest in Japan, and highest in Mongolia. Community-based incidence data of only a few countries are available, with the lowest rates being observed in Malaysia, and the highest in Japan and Taiwan. The availability of prevalence data is higher than incidence data, but different study methods were used for case-finding, with different age bands. For DALYs, Japan has the lowest rates, and Mongolia the highest. For community, a high prevalence of hypertension is seen in Mongolia and Pakistan; diabetes mellitus in Papua New Guinea, Pakistan, and Mongolia; hypercholesterolemia in Japan, Singapore, and Brunei; inactivity in Malaysia; obesity in Brunei, Papua New Guinea, and Mongolia; tobacco smoking in Indonesia. Hypertension is the most frequent risk factor, followed by diabetes mellitus and smoking. Ischemic stroke occurs more frequently than hemorrhagic stroke, and subarachnoid hemorrhages are uncommon. There are variations in the stroke epidemiology between countries in South, East, and South-East Asia. Further research on stroke burden is required.
Asia*
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Brunei
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Cerebrovascular Disorders
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Developing Countries
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Diabetes Mellitus
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Epidemiology*
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Hypercholesterolemia
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Hypertension
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Incidence
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Indonesia
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Japan
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Malaysia
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Mongolia
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Mortality
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Obesity
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Pakistan
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Papua New Guinea
;
Prevalence
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Risk Factors
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Singapore
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Smoke
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Smoking
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Stroke*
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Subarachnoid Hemorrhage
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Taiwan
;
World Health Organization
6.Erratum: Stroke Epidemiology in South, East, and South-East Asia: A Review
Narayanaswamy VENKETASUBRAMANIAN ; Byung Woo YOON ; Jeyaraj PANDIAN ; Jose C NAVARRO
Journal of Stroke 2018;20(1):142-142
On page 287, “The lowest rates are observed in Japan (43.4/1,000,000 person-years and Singapore (47.9/100,000 person-years), followed by Bangladesh, Papua New Guinea, and Bhutan.” sentence should be corrected.
7.Stroke thrombolysis in the Philippines
Jose C NAVARRO ; Maria Cristina San Jose ; Epifania COLLANTES ; Maria Cristina MACROHON-VALDEZ ; Artemio ROXAS ; John HIYADAN ; Arturo SURDILLA ; Muktader KALBI ; Francesca De LEON-GACRAMA ; Cyrus G ESCABILLAS ; Macario REANDELAR
Neurology Asia 2018;23(2):115-120
Background & Objective: Currentlythere is limitedintervention for acute ischemic stroke. Recombinant tissue plasminogen activator (rTPA) has been approved for immediate recanalization after a steno-occlusive lesion of cerebral vessels. rTPA has shown its efficacy and safety from several clinical trials. The present study reports our experience with intravenous rTPA from several centers in the Philippines.Method:This is a retrospective cohort study consisting of 157 patients who qualified to receive rTPA following the NINDS trial inclusion and exclusion criteria. The primary outcome is in-hospital and 3-months mortality. Other outcome measures were determined: intracranial hemorrhage secondary to hemorrhagic conversion and functional outcome as measured by modified Rankin Scale. Additionally, standard dose (0.9mg/kg) was compared to low dose (0.6mg/kg) of rTPA in terms of mortality, intracranial bleeding and functional outcome.Results:The in-hospital mortality was seen in 23 (14.6%) and total death within 3 months was 18.3%. Independent patient (mRS 0-2) was seen in 69 (51.1%) at discharge and 95 (73.1%) at 3 months. Intracranial bleeding due to asymptomatic hemorrhagic transformation occurred in 39 (24.8%) and symptomatic hemorrhagic transformation was seen in 19 (12.1%).Conclusion: Comparing our results with SITS-MOST and Cochrane collaborations, our data showed that we have more independent patients however death and intracranial bleeding was noted to be high in our cohort of patients. Additionally, the study showed more independent patients in the low dose group.
8.Clinical profile, risk factors and aetiology of young ischaemic stroke patients in Asia: A prospective, multicentre, observational, hospital-based study in eight cities
Kay Sin Tan ; Jose C Navarro ; Ka Sing Wong ; Yi Ning Huang ; Hou Chang Chiu ; Niphon Poungvarin ; Shan Jin Ryu ; Ester Bitanga ; Nijasri Suwanwela ; Sardar Mohd Alam ; Woo Yoon
Neurology Asia 2014;19(2):117-127
Background and Objective: There is a lack of international collaborative studies on young adults with ischaemic stroke in Asia. The aim of this study was to investigate risk factors, aetiology and outcome at hospital discharge of these patients across 8 participating countries in Asia. Methods: This was a prospective, observational, multicentre, hospital based cohort study. Consecutive young stroke patients with confirmed cerebral infarction between the ages of 18-49 were recruited from December 2011 to May 2012. Data was collected for patient demography, risk factors, investigations, clinical profile and TOAST classification. Outcome measures were death and independence (modified Rankin score≤ 2) at hospital discharge. Results: Two hundred and eighteen patients with the mean age was 40.8±6.7 years were recruited. There was a larger proportion of male patients with a ratio of 1.9:1. Traditional risk factors observed were hypertension (n=103; 47.3%), dyslipidaemia (n=93; 42.4%), smoking (n=85; 38.8%), diabetes (n=53; 24.3%), alcohol use (n=33; 15.0%), a previous history of stroke and transient ischaemic attacks (6.4%), family history (n=12; 5.5%), migraine (n=6;2.8%), pregnancy related (n=5; 2.3%) and numerous cardiac risk factors (0.9-5.5%). The majority suffered arterial infarction; n=216 (99.4%) while n=2 (0.6%) had venous strokes. The predominant stroke subtypes were large artery atherosclerosis (LAA); 29.8% and small vessel occlusion (SVO); 20.2%. LAA and SVO accounted for 37.5% of all stroke subtypes in the ≤36 year age-group. Cardioembolism (15.1%) and stroke of determined aetiology (14.7%) contributed to the other categories of identified stroke subtypes. Mortality on hospital discharge was 3.1% while 65.1% of patients were independent on discharge. Conclusion: This study demonstrated the substantial presence of premature atherosclerosis and conventional risk factors in young ischaemic stroke patients from 8 Asian cities. Venous infarction from cerebral venous thrombosis was rare in this study. Outcome on hospital discharge was poorer compared to Western studies. Detection of vascular risk factors and primary prevention measures should be initiated during late adolescence or early adulthood in urban Asia.
9.Complication of acute stroke: A study in ten Asian countries
Jose C Navarro ; Ester Bitanga ; Nijasri Suwanwela ; Hui Meng Chang ; Shan Jin Ryu ; Yi Ning Huang ; Lawrence Wong ; Deepak Arjundas ; Bhim Sen Singhal ; Sang Bok Lee ; Byung Woo Yoon ; N Venketasubramanian ; Hou Chang Chiu ; Niphon Poungvarin ; Kay Sin Tan ; Sardar Mohd Alam ; Duc Hinh Le
Neurology Asia 2008;13(1):33-39
Background and Objective: There is a paucity of studies looking into the frequency of complications
after stroke among Asians. We sought to determine the frequency and rate of complications among
Asians after acute stroke. Methods: Consecutive patients with acute stroke among 10 participating Asian
countries were included in the study. The frequency and timing of pre-determined complications, and
their relation to area of admission were noted. Results: Of the 1,153 patients included in the study, 423
(41.9%) developed complications within the first 2 weeks of stroke. Recurrent stroke, chest infections
and urinary tract infections were most commonly encountered, and were most frequent within the
first week of stroke onset. A lower rate of complications was noted among patients admitted at an
organized stroke unit.
Conclusion: There is a similar rate of frequency and timing of complications after acute stroke among
Asians as compared with other populations.
10.IKKβ overexpression together with a lack of tumour suppressor genes causes ameloblastic odontomas in mice.
Angustias PAGE ; Ana BRAVO ; Cristian SUAREZ-CABRERA ; Raquel SANCHEZ-BALTASAR ; Marta OTEO ; Miguel Angel MORCILLO ; M Llanos CASANOVA ; Jose C SEGOVIA ; Manuel NAVARRO ; Angel RAMIREZ
International Journal of Oral Science 2020;12(1):1-1
Odontogenic tumours are a heterogeneous group of lesions that develop in the oral cavity region and are characterized by the formation of tumoural structures that differentiate as teeth. Due to the diversity of their histopathological characteristics and clinical behaviour, the classification of these tumours is still under debate. Alterations in morphogenesis pathways such as the Hedgehog, MAPK and WNT/β-catenin pathways are implicated in the formation of odontogenic lesions, but the molecular bases of many of these lesions are still unknown. In this study, we used genetically modified mice to study the role of IKKβ (a fundamental regulator of NF-κB activity and many other proteins) in oral epithelial cells and odontogenic tissues. Transgenic mice overexpressing IKKβ in oral epithelial cells show a significant increase in immune cells in both the oral epithelia and oral submucosa. They also show changes in the expression of several proteins and miRNAs that are important for cancer development. Interestingly, we found that overactivity of IKKβ in oral epithelia and odontogenic tissues, in conjunction with the loss of tumour suppressor proteins (p53, or p16 and p19), leads to the appearance of odontogenic tumours that can be classified as ameloblastic odontomas, sometimes accompanied by foci of secondary ameloblastic carcinomas. These tumours show NF-κB activation and increased β-catenin activity. These findings may help to elucidate the molecular determinants of odontogenic tumourigenesis and the role of IKKβ in the homoeostasis and tumoural transformation of oral and odontogenic epithelia.